* Copyright (c) 1989 The Regents of the University of California.
* This code is derived from software contributed to Berkeley by
* Rick Macklem at The University of Guelph.
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* @(#)nfs.h 7.11 (Berkeley) 4/19/91
* Tunable constants for nfs
#define NFS_HZ 10 /* Ticks per second for NFS timeouts */
#define NFS_TIMEO (1*NFS_HZ) /* Default timeout = 1 second */
#define NFS_MINTIMEO (NFS_HZ) /* Min timeout to use */
#define NFS_MAXTIMEO (60*NFS_HZ) /* Max timeout to backoff to */
#define NFS_MINIDEMTIMEO (2*NFS_HZ) /* Min timeout for non-idempotent ops*/
#define NFS_RELIABLETIMEO (5*NFS_HZ) /* Min timeout on reliable sockets */
#define NFS_MAXREXMIT 100 /* Stop counting after this many */
#define NFS_MAXWINDOW 1024 /* Max number of outstanding requests */
#define NFS_RETRANS 10 /* Num of retrans for soft mounts */
#define NFS_FISHY 8 /* Host not responding at this count */
#define NFS_ATTRTIMEO 5 /* Attribute cache timeout in sec */
#define NFS_WSIZE 8192 /* Def. write data size <= 8192 */
#define NFS_RSIZE 8192 /* Def. read data size <= 8192 */
#define NFS_MAXREADDIR NFS_MAXDATA /* Max. size of directory read */
#define NFS_MAXASYNCDAEMON 20 /* Max. number async_daemons runable */
#define NFS_DIRBLKSIZ 1024 /* Size of an NFS directory block */
#define NMOD(a) ((a) % nfs_asyncdaemons)
* The set of signals the interrupt an I/O in progress for NFSMNT_INT mounts.
* What should be in this set is open to debate, but I believe that since
* I/O system calls on ufs are never interrupted by signals the set should
* be minimal. My reasoning is that many current programs that use signals
* such as SIGALRM will not expect file I/O system calls to be interrupted
#define NFSINT_SIGMASK (sigmask(SIGINT)|sigmask(SIGTERM)|sigmask(SIGKILL)| \
sigmask(SIGHUP)|sigmask(SIGQUIT))
* Socket errors ignored for connectionless sockets??
* For now, ignore them all
#define NFSIGNORE_SOERROR(s, e) \
((e) != EINTR && (e) != ERESTART && (e) != EWOULDBLOCK && \
((s) & PR_CONNREQUIRED) == 0)
* Nfs outstanding request list element
short r_flags
; /* flags on request, see below */
short r_retry
; /* max retransmission count */
short r_rexmit
; /* current retrans count */
short r_timer
; /* tick counter on reply */
short r_timerinit
; /* reinit tick counter on reply */
struct proc
*r_procp
; /* Proc that did I/O system call */
/* Flag values for r_flags */
#define R_TIMING 0x01 /* timing request (in mntp) */
#define R_SENT 0x02 /* request has been sent */
#define R_SOFTTERM 0x04 /* soft mnt, too many retries */
#define R_INTR 0x08 /* intr mnt, signal pending */
#define R_SOCKERR 0x10 /* Fatal error on socket */
#define R_TPRINTFMSG 0x20 /* Did a tprintf msg. */
#define R_MUSTRESEND 0x40 /* Must resend request */
* Silly rename structure that hangs off the nfsnode until the name
* can be removed by nfs_inactive()
/* And its flag values */
int srvrpccnt
[NFS_NPROCS
];
int srvcache_idemdonehits
;
int srvcache_nonidemdonehits
;
struct nfsstats nfsstats
;